/*头部*/
.header_div{
    position: relative; /*不可重叠*/
    margin-top: 100px;
}

/*头标题文字*/
.lottery_h{
    font-family: Consolas;
    font-size: 30px;
    /*text-align: center;*/
}

/*设置body背景图*/
body {
    background: url("src/images/bg.jpg") repeat;
    height: 100%;
    width: 100%;
    overflow: hidden;
    background-size: cover;
}